{
  "annotation_id": "3bbfe758-6b86-44e7-9488-bc0fb0756810",
  "date_created": "2026-03-02T18:02:10.461000Z",
  "date_modified": "2026-03-02T18:02:10.461000Z",
  "file_hash": "c8f5c66ee9e20824d05b31dc675dc9288f1e4eb6bdbce163a4fd6d3e29b5f974",
  "private": false,
  "record": {
    "abstract": "We report the first experimental realization of entanglement swapping over\nlarge distances in optical fibers. Two photons separated by more than two km of\noptical fibers are entangled, although they never directly interacted. We use\ntwo pairs of time-bin entangled qubits created in spatially separated sources\nand carried by photons at telecommunication wavelengths. A partial Bell state\nmeasurement is performed with one photon from each pair which projects the two\nremaining photons, formerly independent onto an entangled state. A visibility\nhigh enough to violate a Bell inequality is reported, after both photons have\neach travelled through 1.1 km of optical fiber.",
    "arxiv_id": "quant-ph/0409093",
    "authors": [
      "H. de Riedmatten",
      "I. Marcikic",
      "J. A. W. van Houwelingen",
      "W. Tittel",
      "H. Zbinden",
      "N. Gisin"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.71.050302",
    "title": "Long distance entanglement swapping with photons from separated sources",
    "url": "https://arxiv.org/abs/quant-ph/0409093"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "80f25405-ebd2-462e-98a0-4e350e14c00e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}